J.A. Momoh

• Howard University

This paper addresses the transparent and realistic optimum day-ahead (DA) scheduling for a hybrid power system by explicitly considering the uncertainties. The basic components of the hybrid power system include conventional thermal generators, wind farm, and solar photovoltaic (PV) modules. A set of batteries is available for energy storage and/or...

Prony analysis is a methodology that extends the Fourier analysis by directly estimating the frequency, damping, and relative phase of modal components present in a given state trajectory signal. This paper studies the damping profile of the micro-grid with storage system by using Prony analysis in smart-grid, which is different from the convention...

Model Predictive Control (MPC) is an intelligent control method in smart grid. In this paper, a model is built for energy usage control in one room with renewable energy. First, the energy for temperature control in the room can be predicted with lowest amount using MPC. Then simple load models for lights humidity, air condition and basic living ap...

This paper presents a new approach for short term electrical load forecasting (STLF) using artificial neural networks (ANN), and examines the feasibility of various mathematical models for STLF. To make these mathematical models to yield satisfactory and acceptable results, various system models are formulated considering various combination of par...

This paper presents the outcome of a summer precollege engineering enrichment program. The purpose of the summer outreach program is to promote and expose pre-college students to electrical engineering concepts and science, technology, engineering and mathematics (STEM) topics as well as hands on research projects. The summer program is typically a...

This paper proposes an Artificial Neural Network approach for solving the Combined Economic and Emission Dispatch (CEED) problem using Radial Basic Function (RBF) based neural network. The goal of CEED is to minimize both the operating fuel cost and emission level simultaneously, while satisfying load demand and operational constraints. This multi-...

This paper presents a review of optimization techniques for Renewable Energy Resources (RERs) optimization framework. Review of probabilistic power flow, voltage/VAR control, modeling of voltage VAR problem has been presented. Various objective functions and formulations for Voltage/VAR problem has been presented in this paper. Summary of different...

Renewable Energy sources are the requirement of the present power system, not only as replenish source but also as distributed generation source. This paper develops a stochastic optimization for Voltage/Var for Optimal Power Flow (OPF) involving load variation. The Renewable Energy Resources (RERs) also invite some imputes along with it such as st...

The objective of this paper is to enhance the Available Transfer Capability (ATC) from source area to sink area in deregulated power system using Continuous Power Flow (CPF) method during normal and contingency cases with optimal location and control parameter of Flexible AC Transmission System (FACTS) devices such as Thyristor Controlled Series Ca...

Smart energy grid is an emerging area for new applications of machine learning in a non-stationary environment. Such a non-stationary environment emerges when large-scale failures occur at power distribution networks due to external disturbances such as hurricanes and severe storms. Power distribution networks lie at the edge of the grid, and are e...

This paper provides interactive four networks which consist of technology, government, human and policy, and information communication technology (ICT) as tools for meeting the grand challenge of sustainable development in Africa and the global community. It provides also the roadmap of features for the networks which has to be developed by inclusi...

The randomness of photovoltaic (PV) and wind as renewable energy resources (RER) are best modeled as stochastic variable resources with given status and probability density function (pdf). The objective's multiple criteria consist of cost and reliability. These are interlinked by the impact of RER and networks consisting of voltages, flows and avai...

A key objective of the smart grid is to improve reliability of utility services to end users. This requires strengthening resilience of distribution networks that lie at the edge of the grid. However, distribution networks are exposed to external disturbances such as hurricanes and snow storms where electricity service to customers is disrupted rep...

A key objective of the smart grid is to improve reliability of utility services to end users. This requires strengthening resilience of distribution networks that lie at the edge of the grid. However, distribution networks are exposed to external disturbances such as hurricanes and snow storms where electricity service to customers is disrupted rep...

The present power grid is complex due to enormous real time applications and hence requires new developmental areas of smart grid. As such, the grid which has been slowly becoming ‘modernized’ to meet the new challenges is overly stressed. In a bid to develop enabling technologies so as to address the mitigation of the various stresses the power gr...

The Approach Lighting System in use by Federal Aviation Administration has over the years been subjected to lightning affects that results in breakdown of an the Individual Control Cabinet (ICC box). Previous work has investigated to what extent lightning surge effect could have on the ICC box. This work had resulted in the configurations of the AL...

In this work, we study cascaded disruptions between communication networks and power, using heterogeneous mea- surements and learning. We define sustainability of communica- tion using distributed energy sources upon power outages, and estimate the sustainability for example networks. I. INTRODUCTION

To ensure that the future students / researchers are equipped for operate the new Smart Grid, the diversification of the Power Engineering Education is required. Fundamentals of Smart grid Technology such as Communications, Wide area Measurements, Systems Theory and Control, renewable energy penetration, cyber-security and standards requirements mu...

This paper presents the results of studies which applies a multi-objective optimization function for the management of a solar based DC spacecraft network of the ring bus topology. The optimization function is utilized which features the objectives of optimizing the utilization of solar energy to continually meet the needs of the network while mini...

This paper reports on an ongoing research effort between researchers in North America and Africa on the study of the dynamics of loosely regulated and rapidly growing power systems, with focus on the Nigerian power network. A description of the implementation of Virginia Tech's FDR (Frequency Distur-bance Recorder) at Bauchi, Nigeria is provided. W...

This paper presents the prototype of a direct dynamic optimization strategy to enhance the long term voltage stability. Based on the Quasi-steady-state model, the coordinated voltage control problem is presented by a differential-algebra optimization form. The dynamic optimization problem is transferred to a nonlinear programming model by approxima...

This paper develops an integrated strategy for maintaining voltage stability for online applications. The proposed strategy employs real time data in the computation of a voltage stability index for voltage stability monitoring and control. The index chosen allows for the fast evaluation of the voltage stability margin for real-time assessment. A f...

The focus of this paper is the development of a multi-agent system (MAS) for detection and diagnosis of arcing faults in the shipboard electric power systems. Also provided is fault management via scheduling to maintain shipboard power system operation. The control schemes in the MAS framework are based on optimization methods and rule-based techni...

Introduction Power System Challenges Solution of the EPNES Architecture Implementation Strategies for EPNES Test Beds for EPNES Examples of Funded Research Work in Response to the EPNES Solicitation Future Directions of EPNES Conclusions Acknowledgments Bibliography

This chapter presents a summary tutorial based on a course titled "Next Generation Optimization for Power Systems." It utilizes state-of-the-art research in optimization Systems Engineering, Operation Research, Intelligent Systems, AI communities to solve the grand challenge problems of electric power networks. The work is inspired by the initiativ...

Based on quasi-steady-state model, the coordinated voltage control problem was represented by an optimization objective subjected to differential-algebraic equations with continuous-discrete time variables. A direct dynamic optimization approach from modern control theories was introduced to solve the dynamic optimization problems. The dynamic opti...

This paper presents results on an ongoing work in the area of power quality and network performance improvements utilizing Distributed Energy Resources (DERs) in power systems. The work presented particularly addresses the optimization of switching and selection of installed DERs within the network and the analysis of their impacts on the power qua...

This paper presents simulation and experimental testing being performed on electrical protection systems for Approach Lighting System (ALS) used in major US airports. The main focus of the investigations is to validate selected protection topology needed to safeguard critical Individual Control Cabinet (ICC) used by Federal Aviation Administration...

Research in areas of voltage stability monitoring, assessment and control of power systems is an ongoing international activity at Howard University. The research engineering development involves real-time system parameters to compute a Voltage Stability Index (VSI) and margin, and provide advanced control schemes to mitigate the Voltage/Var proble...

Frequency is one of the most important measures of the state of a power system, especially for structurally weak and rapidly growing power systems. Thus, frequency monitoring is a desirable practice to ensure reliability and provide data for analysis. This paper reports the joint work between Abubakar Tafawa Balewa University (ATBU) and Rensselaer...

The modernization of the US electric power infrastructure, especially in lieu of its aging, overstressed networks; shifts in social, energy and environmental policies, and also new vulnerabilities, is a national concern. Our system are required to be more adaptive and secure more than every before. Consumers are also demanding increased power quali...

The stability and security of power systems are of utmost importance to planning and operation engineers. As demand on grid resources increase, and contingency impacts on the interconnected power grids become more threatening/severe, real-time determination of power system operation and control is needed. This paper therefore develops an integrated...

In this paper, an approach to determine the value-added benefits of distributed generation (DGs) on the performance of power system is proposed. It utilizes a robust optimization technique to compute marginal price contributions of distributed generation (DGs) in a typical power system network. An approach that is based on optimal power flow has be...

The locational marginal prices (LMPs) for real and reactive power is calculated with the framework of full AC optimal power flow (OPF). The production cost of reactive power from various generation sources including generators and reactive compensators was integrated in the objective function with operation constraints. Interior point method combin...

Survivability and reliability are critical for the operation of shipboard power system both in normal and damage conditions. This paper presents a novel dynamic reconfiguration approach for shipboard power system by using multi-agent system. With the similar topology of the shipboard power system, the multi-agent system is generalized to constraint...

The Navy IPS is a highly complex network that is often times subjected to high-impact contingencies during operations. Cases that result in arc faults, which pose threats to life, mission, and/or ship components, require effective mitigation with minimal manning. This paper is aimed at developing an optimization strategy for quenching arc faults. T...

The electric power distribution systems of Naval Ships require autonomous control under all operating conditions. In some instances, natural or forced disturbances lead to arc faults between conductors and/or the hull of the ship. This paper develops a Rule-Base (RB) approach for arcing fault control with appropriate recommendations that minimize t...

Voltage security of modern power system remains an important aspect of sustaining our economies and high standards of living. The operation of such systems requires adhering to regulations to ensure that the system voltages throughout the network are kept within safe, contractual limits. Several researchers have investigated ways to determine volta...

The mitigation of the impact of lightning and the individual control cabinet (ICC) protection of an approach lighting system (ALS) against over-voltage is the focus of this paper. It is the objective of this paper to evaluate three proposed ALS topologies and select the grounding configuration which optimally mitigates the high voltage and current...

This paper develops a new index to rank the contingencies in different partitioned areas of networks. The new index considers the social and economic impacts of the contingencies and ranks them by using an overall index that combines these effects with technical factors. This overall index is implemented in the Western Systems Coordinating Council...

This research is aimed at evaluating new advances in optimization and its applications to power system operation and planning. In this paper we present unique methodologies for solving special class of power system problems that are challenged by classical operational research optimization techniques. These methodologies include network reconfigura...

This paper is a study of the optimization of a configuration and reconfiguration problem applied to the navy ship power system presenting a redundant power distribution layout. The multiagent method has been applied in order to make the power system converge towards its optimal configuration in its initial start up and during normal operation when...

Different from most power systems, the requirement for reliability of the power system on board a spacecraft is much more stringent. However, the reliability of the spacecraft power system can not be solely realized by increasing system redundancies due to limitations on mass. A ring-bus topology has been proposed for this purpose. This paper provi...

This first chapter summarizes the motivation for holding the November 2003 National Science Foundation Workshop, and provides a listing of the Workshop speakers and their presentations. It also contains an overview of the articles contained in this compilation.

This paper presents a multi-agent system framework that performs system restoration for Navy ship. If Navy surface combatants' electric power supply interruption is caused by a fault, it is important to restore the power system as soon as possible to a target network configuration after the fault. The system views the problem as the interaction of...

Smooth and uninterrupted operation in the ship electric power system requires very efficient fault protection schemes for the electrical apparatus and components in the network. Detection and identification of fault therefore become necessary in order to provide protection for the network in events of a fault. This paper presents modeling and detec...

Different from most power systems, the requirement for reliability of the power system on board a spacecraft is much more stringent. However, the reliability of the spacecraft power system can not be solely realized by increasing system redundancies due to limitations on mass. A Ring-Bus topology has been proposed for this purpose. This paper provi...

This paper solves a unit commitment (UC) problem of the interconnected power system. The UC provides an approach to decrease the cost and improve reliability of the network. The UC is a dynamic process, and the generation plan is always changing according to different load and network topology. The problem is solved by ADP which solves the dynamic...

Distributed generation (DG) has emerged as a practical and viable technology for alleviating power system shortages related to generation and transmission inadequacies. The market location and coordination of a selected DG technology is of high importance to engineers and power marketers. This paper develops an approach for coordinating DG on a gri...

The achievements in system engineering in the analysis and control of power system reliability and security over the last three decades, accomplished by taking full advantages of advances in computer, communication, and control technologies, are truly remarkable. For example, the economic generation commitment and dispatch for large power systems a...

Summary form only given. Designing an efficient and secure power system is a concern of both civilian and military systems for survivability and reconfigurability during any external and internal attacks or disturbances which might cause service disruption. The next generation of high performance systems will be designed and upgraded with the inter...

US and Africa have been involved in collaborations leading to technology transfer from US to Africa in addressing some of the economic problems of the continent. The US-African power research and education exchange is born out of efforts put forward by both US and African power engineering academia and industry. It was initiated with funding in 199...

Recent advances in photovoltaic (PV) technologies have brought very promising opportunities for the utilization of renewable solar energy systems. The power generation performance of PV system can be influenced by random insolation level, cell temperature, fault level of PV arrays and the output voltage level. It is very necessary to track and disp...

This paper presents a novel, fast integer interior point programming method that incorporates a branch and bound technique with the interior point linear programming technique to optimize the multi-objective problem under operating and radiality constraints to solve the stressed distribution system. The reliability of the integrated reconfiguration...

In this paper, a reliable and cost-effective scheme for reconfiguration of the distribution system has been designed to handle the multi-objective problem of re-configuration. The objectives considered are service restoration and load balancing. Mathematical programming approach has been utilized for the reconfiguration considering cost effective s...

The deregulation and restructuring of the electric utility industry promise to transform the delivery of power and energy services. A number of new distributed generated technologies are currently available offering a combination of performance and flexibility. Distributed generation is favored particularly because of increased energy efficiency an...

Summary form only given. Several research communities advocate for collaboration among domain experts. This is need due to the complexity of the problems to solve which requires more than expert, to guarantee reliability and affordability given the constraints. The power systems discussed is proven to be the optimum bench mark system for validating...

In this paper remedial action for DC arcing faults in spacecraft has been designed and implemented using Lab VIEW. The Lab VIEW is an innovative graphical programming system designed to facilitate computer controlled data acquisition and analysis. DC arcing faults in spacecraft has been designed and implemented using the experimental data obtained...

This paper presents a novel scheme based on fast Fourier transformation and artificial neural network is utilized to design and analysis of the DC arcing faults in a spacecraft, for NASA experimental set up. It is important to keep the continuity of the power supply and at the same time increase the reliability of spacecraft energy power system (EP...

Leakage impulse current of the faulty insulators was experimentally studied. The leakage impulse current was characterized in terms of the phase-time base of the applied voltage. The study showed that the leakage impulse is observed only in a distinct location in phase-time space. Based on the findings, prioritized maintenance scheduling was propos...

This paper proposes an application of the analytic hierarchy process (AHP) and analytic network process (ANP) for enhancing the selection of generating power units for appropriate price allocation in a competitive power environment. The scheme addresses adequate ranking, prioritizing, and scheduling of units before optimizing the pricing of generat...

The arcing faults on cables of aerospace power systems represent a major safety concern for spacecraft. To ensure the normal operation of the Power Management and Distribution (PMAD) system, it is necessary that remedial control strategies are developed and implemented. Most of the research in this area deal mainly with arcing faults in terrestrial...

In spacecraft energy power system (EPS), the objective of fault protection is to detect and respond to spacecraft faults. Its purpose is to eliminate single point failures or their effects and to ensure the spacecraft system integrity under anomalous conditions. Also, it is important to keep the continuity of the power supply and at the same time i...

Summary form only given as follows. A price structure for providing reactive power service and control based on optimal power flow (OPF) approach is developed. The cost of reactive power support service is determined based on capability and contributions to the improvement of system performance such as security, reliability and economics, by comput...

NSF has been pioneer of new research activity and education reforms. To keep the pace with technology, new development dealing with changes in engineering and industry has been a concern. For example, the problem facing the power industry transmission systems are solved by a range of advanced methods, in science and technology. They range from info...

This paper reports an application of the Everett optimization technique for value-based load shedding in naval-ship power system with network constraints and application of reliability constraints. A new congestion analysis index—expected contingency margin (ECM), which considers the probability of disturbance, and reliability indices loss of load...

A new barrier optimization technique is developed for general optimization purposes and applied for power system optimization problems.

This paper presents a new nonlinear convex network flow programming (NLCNFP) model and algorithm for solving the security-constrained multi-area economic dispatch (MAED) problem. The tie-line security and transfer constraints in each area are considered in the MAED model. A simple analysis of a buying and selling contract in a multi-area environmen...

A new barrier optimization technique is developed for general optimization purposes and applied for power system optimization problems.

This paper presents an integrated optimal power flow (OPF) with phase shifter approach to enhance power system security. The general OPF calculations are hourly based and the control variables of OPF are continuous. The calculations of phase shifter are daily based, however, and the variables related to phase shifter are discrete. Therefore, the ge...

This paper presents an integrated optimal power flow (OPF) with phase shifter approach to enhance power system security. The general OPF calculations are hourly based and the control variables of OPF are continuous. However, the calculations of phase shifter are daily based, and the variables related to phase shifter are discrete. Therefore, the ge...

This paper provides a fuzzy logic control scheme for PV power systems under faults and load disturbances. The classical model using microprocessors, power electronics and DC-DC converters can be made less complicated with the application of a fuzzy logic controller, which is robust and good for nonlinear systems. Inputs to the fuzzy logic controlle...

Security assessment of naval-ship power system under different fault conditions is important for real time operation of naval-ship power system. The existing indices of security assessment did not incorporate the probability of disturbances: therefore this paper proposes a probabilistic security assessment index. As the naval ship architecture is i...

A new approach is presented to congestion analysis and optimal load shedding for aerospace power systems. Optimal power Row, an analytic hierarchical process, and the Everett optimization method (Everett, II., Operations Research, Vol. 11, 1963, pp. 399-417) are employed for implementing this approach. several system performance indices are develop...

The need for improving load shedding on board the space station is one of the goals of aerospace power system automation. To accelerate the optimum load-shedding functions, several constraints must be involved. These constraints include congestion margin determined by weighted probability contingency, component/system reliability index, generation...

This paper discusses the application of field data to a new supervised clustering-based arcing distribution fault diagnosis method. The fault diagnosis method can perform three functions that provide preliminary fault location information for grounded and ungrounded power distribution systems: fault detection, faulted type classification, and fault...

In this paper, a novel concept and computational framework of the electrical power system Expected Voltage Stability Margin (EVSM) are suggested. The EVSM index gives a convenient integrated voltage stability characteristic for a variety of possible system configurations and load levels. This scalar parameter expresses the general voltage stability...

The paper presents a scheme for evaluating and optimally enhancing power system reliability for a short-time horizon operation of one week. Power system reliability can be efficiently enhanced by applying appropriate remedial actions (RAs). This paper investigates the impact of remedial actions on system reliability, the corresponding associated co...

This paper presents a modeling framework for operations planning for generation and transmission for a period of a year or few months that incorporates (in an approximate way) the dynamic constraints on generator output and the static transmission constraints. The model is capable of performing the following tasks: generation scheduling, interutili...

Since conventional optimal power flow (OPF) algorithms are limited and too slow for operational planning, power system operation and planning engineers have been seeking efficient OPF algorithms for three decades. The interior point method is one of the most efficient algorithms. In this paper, an improved quadratic interior point (IQIP) method is...

This paper develops a novel concept and computational framework of a probabilistic transient stability index called the expected angle stability margin, EASM, for electrical power systems. This new integrated index provides a common transient (angle) stability characteristic over a set of possible system configurations and contingencies, disturbanc...

This paper provides a novel framework for extending conventional probabilistic reliability analysis to account for system stability limits. The scheme integrates a voltage stability index with existing reliability tools for offline assessment. The index relates the probability of instability to the proximity of voltage collapse. The scheme is succe...

For pt.II see ibid., vol.14, no.1, p.96-104 (1999). This second of a two part paper offers a survey of literature on optimal power flow from 1968-93. This part treats Newton-based, linear programming and interior point methods of solution

The paper presents a review of literature on optimal power flow tracing progress in this area over from 1962-93. Part I deals with the application of nonlinear and quadratic programming

An integrated approach for reactive power price and control is developed. Reactive power price is divided into fixed and variable parts. The fixed part is the operational cost of reactive power service. The variable part of reactive power price is determined based on capability and contributions to the improvement of system performance such as secu...

This paper presents an evaluation approach of power system architectures for small spacecraft. Five power system architectures for small spacecraft application are used for purposes of testing the proposed approach. The performance analysis of five spacecraft architectures is conducted based on energy requirements, mass, and reliability. The most e...

This paper studies aerospace power system automation using the optimal power flow (OPF) and Everett method. Several system performance indices are developed to evaluate the degree of system congestion for different operation time stages. These performance indices include a circuit overload index and a system voltage problem index and obtained throu...

This paper proposes a new method to study reactive power pricing and new VAr source selection using the analytic hierarchical process (AHP), and presents a price structure for providing reactive power service and control based on the OPF approach. The cost of reactive power support service is determined based on capability and contribution to impro...

This paper describes a unique value-based reliability enhancement method for bulk transmission system planning. Reinforcement alternatives are evaluated considering their cost and impact on system reliability based on system capability studies under contingency conditions. A dollar value quantification of the level of reliability is presented in th...

This paper proposes an application of the analytic hierarchy process (AHP) and analytic network process (ANP) for enhancing the selection of generating power units for appropriate price allocation in a competitive power environment. The scheme addresses adequate ranking, prioritizing and scheduling of units before optimizing the pricing of generati...

This paper develops a novel concept and computational framework of the expected angle stability margin (EASM) in electrical power systems. This new integrated index provides a common transient (angle) stability characteristic over a set of possible system configurations and contingencies, disturbances and faults, and load demand levels. The EASM ex...

This paper presents an integrated approach to study the optimal power flow (OPF) with phase shifter for alleviating line overloads. It is noted that the general OPF calculations are hourly based and the control variables of OPF are continuous. However, the calculations of phase shifter are daily based, and the variable of phase shift is discrete as...

This paper develops a novel concept and computational framework of the expected voltage stability margin (EVSM) for electrical power systems. This new integrated index provides a common voltage stability characteristic over a set of possible system configurations and load demands. The EVSM expresses a general voltage stability "fitness" of the syst...

The paper develops a price structure for providing reactive power service and control based on optimal power flow (OPF) approach. The cost of reactive power support service is determined based on capability and contributions to the improvement of system performance such as security, reliability and economics, by computing sensitivity of objective f...

This paper presents an integrated scheme for value-based distribution system reliability analysis. The approach balances between the cost of improving service reliability for customers and the economic benefits of such improvements. A set of reliability indices, such as: load/energy curtailed, the cost of outages, and the cost of interruption to a...

The paper presents a scheme for evaluating and optimally enhancing system reliability for a short time horizon operation of one week. Power system reliability can be efficiently enhanced by applying appropriate remedial actions (RAs). This paper investigates the impact of remedial actions on system reliability, the corresponding associated cost and...

The work presented in this paper describes a generation rescheduling scheme for dynamic security enhancement of single and multi-area electric power system. Existing work done in the dynamic security enhancement has been for single area power systems. A multi-area scheme has not been considered in available literature. In this work a heuristic enha...

The paper serves as a tutorial review on artificial neural network (ANN) applications to short-term load forecasting (STLF). Various approaches of implementation of ANN-based load forecasting are demonstrated. Two case studies using ANN-based LF were developed, one is for power system operation and the other is for load forecasting of hybrid electr...